I don't to be able to use [square bracket] syntax to refer to a group with a space in it. As the following example shows, everything works but [Group B]. Even [GroupE] works, so it specifically when using square brackets and using a space. Thx!

Thanks, I hadn't realized I could switch short name and long name like that. How does plantuml choose which name to use for the label? It seems it always picks the one with the space (vs longest or first)?

For example, in this example both "Group B" and Group D" are use the name with the space. While GroupG still uses "GroupG" even though there is a longer name.